Golang Weekly

Go code can now run before your OS does

Fri, 4 Sep 2026 00:00:00 +0000

#616 — September 4, 2026

Go Weekly

Go 1.27 Can Now Find Leaked Goroutines — Go 1.27 added a goroutineleak profile that spots goroutines permanently blocked on channels or sync primitives, even in production. It piggybacks on the GC's reachability tracing and is quite precise. Unusually for a Go feature, this began life as an academic paper (of which Vlad was lead author) from Aarhus, WashU, and Uber.

Vlad Saioc

Query a Billion Rows Without Leaving Postgres — Analytics on a billion rows usually means a warehouse and a pipeline. TimescaleDB extends Postgres instead: hypertables, columnar compression, and continuous aggregates keep queries in milliseconds. One database, same SQL. Get $1000 credit to start.

Tiger Data (creators of TimescaleDB) sponsor

TinyGo 0.42: recover Works, and Go Can Now Boot Your PC — A big one for the Go compiler for microcontrollers and WebAssembly, which can now recover from runtime panics (like nil dereferences) as standard Go does. Go 1.27 support also arrives and, curiously, a UEFI target (in early form) so Go code can run before the OS does.

The TinyGo Team

IN BRIEF:

Go 1.27.1 and 1.26.8 have been released with fixes for cgo, the compiler, and several packages. No security updates.
🤖 Russ Cox says frontier LLMs are "much better and dramatically faster" than he is at finding and fixing Go bugs, and shares the agent transcripts to prove it. (He also mentions he's no longer at Google.)
The long effort to move HTTP/2 natively into net/http has been marked "And done" by Damien Neil, with x/net/http2 headed for deprecation.

How Swiss Tables Work in Go’s Built-in Map — If you've wondered what happens when you write m[key] = value in Go, this illustrated tour of the new (as of 1.24) Swiss Table implementation is fantastic. It also covers 1.27's mapsplitgroup experiment that separates keys from values in memory.

Phuong Le (VictoriaMetrics)

📊 The New Go JSON API: Twice As Fast, or 1.5x Slower? — A quick benchmark of Go 1.27's JSON packages, including encoding/json/v2. Unmarshalling is faster with v2, but Daniel finds marshalling a slice of typed structs is 1.5x slower, counter to the performance claims in the release notes.

Daniel Lemire

🤖 Rewriting a Node.js Service in Go with AI Agents — A truly 2026 tale of an overnight porting run, with a focus on doing agentic engineering well, like building a solid test harness first.

Edvinas Janusevicius (Checkly)

🛠 Code & Tools

purego 0.11: Call C Functions from Go without Cgo — Born from porting Ebitengine off Cgo, this lets you Dlopen a shared library and register C functions as Go functions. v0.11 requires Go 1.25+ but adds struct passing on Windows, Android, and iOS and supports structs in callbacks.

Ebitengine

Tailcat: Tailscale's WireGuard, NAT Traversal and DERP as a Go Library — Brad's netcat over Tailscale's WireGuard, NAT traversal and DERP data plane (minus the control plane). Anyone fancy creating hole-punched net.Conns between any two machines?

Brad Fitzpatrick

automemlimit 1.0: Sets GOMEMLIMIT to Match cgroups — Blank-import this and GOMEMLIMIT is set to 90% of the Linux cgroups(7) memory limit. Note that the API has breaking changes if you're an existing user.

Geon Kim

AWS Lambda for Go 1.55 – AWS's official library for writing Lambda functions in Go improves Go 1.27 compatibility and now requires Go 1.26+.
GoReleaser 2.18 – The release automation tool adds preflight checks and release summaries in GitHub Actions.
quic-go 0.62 – Pure Go QUIC and HTTP/3 implementation, now with RFC 9218 stream priorities.
Miniredis 2.39 – Pure Go Redis server for unit tests, now with GEOSEARCH and hash field TTLs.
🤖 MCP-Go 1.0 – Go implementation of the Model Context Protocol (MCP).
Notify 1.6 – One API for sending notifications to numerous services.
fq 0.18 – Decode and query binary files with a jq-style language.
bluetooth 0.16 – Bluetooth Low Energy API for Go and TinyGo.

📰 Classifieds

🧠 Discern is hiring a senior full-stack Go/React dev to help automate entity compliance (US/LATAM). Join us.

🤖 NYC Robot Hackathon: Apply now. 2 days, no robotics experience needed — just code. Win an arm + up to $5K in Viam credits. luma.com/wuo6ynis.

Generic methods land in Go 1.27

Fri, 28 Aug 2026 00:00:00 +0000

#615 — August 28, 2026

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🗓️ If you missed us last week, good news… we're back! As expected, Go 1.27 landed last week, but there's plenty more to get into today :-)
__
Your editor, Peter Cooper

Go Weekly

⭐ Go 1.27 Released — We spent much of the previous issue anticipating this release, so we'll let it speak for itself, but 1.27 is now ready to go with the final release notes and Jesús Espino's Go 1.27 interactive tour covering the full details and practical updates respectively.

The Go Team

Introducing Generic Methods — A full explainer of the Go 1.27 feature that's caused the most excitement, at least in terms of Go Weekly clicks! Concrete methods can now take type parameters, though interface methods still cannot, and Mark explains the reason why.

Mark Freeman

The #1 Open-Source Code Reviewer on Code-Review-Bench — PR-AF places #2 of 42 overall on Martian's Code-Review-Bench, ahead of the commercial tools, at ~10x lower cost per review. It plans the review per PR, runs reviewer agents in parallel, and verifies every finding against your source. Self-hosted.

AgentField.ai sponsor

IN BRIEF:

Go co-creator Rob Pike has received the 2026 USENIX Lifetime Achievement Award in recognition of his many achievements. He recorded ▶️ a brief acceptance speech.
🗑️ Sean Liao proposes deprecating http.Dir, http.FileSystem, and related functions in favor of their io/fs.FS variants.
net/http is getting a MethodQuery constant now that RFC 10008 has standardized the HTTP QUERY method.
llgo, an LLVM-based Go compiler built "in order to better integrate Go with the C ecosystem", has just reached 1.0.

▶ 20 Talks from GopherCon UK 2026 — A wide range of well-recorded talks from this month's GopherCon UK event covering topics like set operations in Go, building tools to refactor Go, and a deep dive into the select statement.

YouTube

7.5x Faster Encryption with simd and simd/archsimd — A look at a more niche development in Go 1.27, using the new (and experimental) SIMD packages to accelerate ChaCha20 encryption without writing any assembly (on arm64, pure Go nearly matches the hand-written version!).

Sylvain Kerkour

📄 Hunting Down a Go Runtime Bug on 32-bit Embedded Systems – A runtime bug that slipped into Go 1.14 in 2020 and was only just fixed for Go 1.28. Richard Weinberger

📄 Using Scoped Coverage to Prune an AI-Generated Go Test Suite Preslav Rachev

📄 Building htop for the Web with Go and Datastar Alex Pliutau

📄 Understanding sync.Map from API to Hash Trie Phuong Le

🛠 Code & Tools

Goldmark 2.0: A Markdown Parser Written in Go — The first breaking release in seven years for Go's de facto CommonMark-compliant Markdown parser. Along come generics, a cleaner split between parser and renderer for non-HTML output, and position info on every AST node.

Yusuke Inuzuka

💡 However, there's also a proposal to add a text/markdown package to the standard library (based on rsc.io/markdown) which Russ Cox says is "much simpler and more spec-compliant than goldmark".

Your Go Service Runs Lean. Your Data Stack Should Too — TimescaleDB extends Postgres so analytics runs on one database, not a pipeline of tools. Get $1000 credit to start.

Tiger Data (creators of TimescaleDB) sponsor

Staticcheck: A State of the Art Linter for Go 1.27 — Uses static analysis to find bugs and performance issues, offer simplifications, and enforce style rules with over 150 checks. The latest release adds support for Go 1.27 and a new check for misused defers.

Dominik Honnef

shortuuid 5.0: Generate Concise, Unambiguous URL-Safe UUIDs — Think short, user-facing IDs (e.g. KwSysDpxcBU9FNhGkn2dCf) where UUIDs are encoded into base57. v5.0 adds UUIDv4, v5, and v7 generators and drops its last dependency by using Go 1.27's stdlib uuid package.

Peter Lithammer

Sloc, Cloc and Code (scc) 4.0: A Fast Accurate 'Code Counter' — Tool to count lines of code and estimate code complexity across many programming languages.

Ben Boyter

Bubbles 2.2 – Components for building interactive terminal apps with Bubble Tea (of which v2.0.9 was just released). Textarea now supports text selection and there's a new Tree component (above).
Resterm 1.4 – Terminal-first client for HTTP, GraphQL, gRPC, WebSocket, and SSE.
goverter 1.10 – Generate type-safe converters by defining function signatures.
go-size-analyzer 1.14 – Tool for analyzing the size of compiled Go binaries.
goquery 1.13.0 – jQuery-like syntax and features for working with HTML.
gopy 0.5 – Generate and compile CPython extension modules from Go.
📋 clipboard 0.9 – Cross-platform clipboard access from Go.

📰 Classifieds

🧠 Discern is hiring a senior full-stack Go/React dev to help automate entity compliance (US/LATAM). Join us.

🦾 Free robotics course, zero hardware. Self-paced, in simulation, all you need is code. viam.com/viam-101.

📢 Elsewhere in the ecosystem

✨ The Shape of Go presents every public Go module connected together with its dependencies as a galaxy-like visualization. You can explore it live here.
In Stop Making TUIs, Thomas Ptacek says: "We build terminal interfaces because we have to, not because we should."
Did you know splitting a git commit is now a single command (in Git 2.54+)? git history split <ref> walks the change hunk by hunk and prompts for both messages.
A detailed look at all the things that should go in your HTML <head> in a modern web page.
Chaz Schlarp, a security engineer at Amazon, shows what's possible when you point an AI agent at your various peripherals to take control of or reverse engineer them. I've had fun doing this too and Go is often a good fit.
GitHub now lets you close all open contributions authored by a blocked user.

A slightly unusual issue, in three acts

Fri, 14 Aug 2026 00:00:00 +0000

#614 — August 14, 2026

Read the Web Version

🏖️ We're taking a break next week, and will be back on August 28. Due to this, and the imminent Go 1.27 release, we're shaking the format up a bit this week…!
__
Your editor, Peter Cooper

Go Weekly

Why Go is an Ideal Language for AI-Assisted Software Engineering — Two Googlers, including Go lead Cameron Balahan, make the case that Go's features, like standardized formatting, a solid standard library, and the compatibility promise, make it a particularly good language for agents.

Cameron Balahan and Richard Seroter (Google)

🗣️ This piece provoked some discussion, most notably on Hacker News where the tone was quite adversarial, while r/golang did a better job than the post itself of explaining what's specifically Go about the argument.

The Analytics Stack That's Just Postgres — CERN runs TimescaleDB on Postgres for Large Hadron Collider sensor data: 95% less storage, 40% faster queries. Same Postgres you run, extended with hypertables and compression. Analytics at scale, no second database. Get $1000 credit to start.

Tiger Data (creators of TimescaleDB) sponsor

IN BRIEF:

Go 1.27 Release Candidate 3 is out, with the final just around the corner. More on that later in this issue.
🔐 Go 1.26.6 and Go 1.25.13 are out too with ten security fixes (explained within), including two that let a malicious GOPROXY or GOSUMDB slip module content past the checksum database.
Fiber 3.5, the latest version of the popular Express-inspired web framework, has been released with speedups, middleware security hardening, and fixes.

📊 Profile-Guided Optimization in Go — Turning PGO on for encoding/json parsing yielded up to 4.7% more throughput in Daniel's experiment. He also trained profiles on three different JSON documents and measured each build against all three, so you can see how well a profile transfers to previously unseen workloads.

Daniel Lemire

📄 Understanding Go AI Inference: Yzma – yzma provides a way to integrate llama.cpp into Go apps, but how it does it without CGo is the interesting bit! Jesús Espino

📄 Sets in Go: Past, Present and Future – Slides from this week's GopherCon UK talk on the set types proposed for Go 1.28. Luciano Ramalho

📄 Rewriting the Appwrite CLI in Go – A TypeScript to Go migration story covering why Go vs Rust, and how their now Go-powered CLI is still distributed on npm, as per-platform binary packages. Chirag Aggarwal (Appwrite)

👀 Go 1.27 is almost here!

Final Go releases often arrive a week or so after the third release candidate (as mentioned above), so Go 1.27 may be released next week while we're away… 😱

If it lands in our absence (it'll be announced on the official Go blog), here are a few resources to help you navigate the release:

The DRAFT Go 1.27 Release Notes – The release notes, while still in draft form, are essentially a laundry list of everything that will land. And, bonus, this page will magically become the final release notes upon release.
🎉 The online Go 1.27 Release Party – JetBrains is holding an event along with members of the Go team on August 25 at 4:00 pm UTC.
Generic Methods Land in Go – The feature Go Weekly readers have been most excited about this year by a long shot, if clicks are anything to go by.
Finding Leaked Goroutines in Go 1.27 – A look at what the new goroutine leak detector in runtime/pprof can and can't do.
Jesús Espino's Go 1.27 Interactive Tour covers a wide range of features.

Open Source Hit Frontier-Level Code Review at a Tenth of the Cost — PR-AF places #2 of 42 on Martian's Code-Review-Bench. Verified findings only, self-hosted, any open model.

Agentfield.AI sponsor

🏆 Highlights of the Year So Far

Before we take a week away, we're reflecting on some of the highlights of 2026 so far. We know it's not always possible to read every issue, so here are a few items you may have missed that we enjoyed! :-)

The Most Popular Go Dependency Is… – Testify! Thibaut Rousseau shares the fascinating process he went through to figure that out, and shares the rest of the top 10.
The Go 1.26 Interactive Tour – As we learnt last week, this was Anton Zhiyanov's final Go tour and it still provides a good look at modern Go features you might not yet be using.
Go Naming Conventions: A Practical Guide – A thorough single-page reference covering identifiers, filenames, packages, and the concept of "avoiding chatter."
~~templUI~~ shadcn-templ: Customizable UI Components for Go and Templ – Templ is Go's answer to JSX… kinda. And shadcn-templ (the new name for templUI) offers a suite of components and themes, leaning on Tailwind CSS, to use with it.
A 'Pure Go' Linux Environment, Inspired by Fabrice Bellard – I forgot this existed, but it still impresses! With a single go run you can get a Linux environment up and running. Now I just need to find a use for it…

And that's a wrap! We'll see you again on Friday, August 28! 👋

P.S. A huge thanks to everyone who's sent in submissions lately. There have been so many that I've fallen behind a lot, but every email gets read and I'll be playing catch up on my return :-)

An interactive tour of Go 1.27

Fri, 7 Aug 2026 00:00:00 +0000

#613 — August 7, 2026

Read the Web Version

Go Weekly

An Interactive Tour of Go 1.27 — Anton Zhiyanov made interactive tours for Go 1.22 through 1.26 but decided to stop. Jesús Espino has picked up the baton and tackles Go 1.27's huge array of features here, from generic methods and the goroutineleak profile to the new uuid package and experimental portable SIMD.

Jesús Espino

💡 No, Go 1.27 has not been released yet, but the second release candidate is solid, and the final is expected in the next week or two.

Harness Engineering: How to Wrangle Your Agents — The models keep changing. The harness is the part you build. Scott Moss (Netflix) shows how: durable execution, sandboxed tool calls, memory systems, and multi-agent handoffs.

Master.dev sponsor

A Proposal to Fix Go's Proposal Backlog — The backlog is growing 23% a year with the median item over two years old. Austin Clements proposes a formal triage group, review tracks, and weighted community emoji voting to decide what gets reviewed next (though not what gets accepted).

The Go Team

Going Backward (or Why slices.Backward Looks So Complicated) — slices.Backward's signature is intimidating at first glance, so Anton reinvents it step-by-step, from a naive slice copy to callback iterators, iter.Seq2, and the ~[]E constraint. Then, fingers crossed… it clicks?

Anton Zhiyanov

Adding Go's defer to the TypeScript Compiler — Since tsc is now written in Go, hacking on it is unusually friendly territory for a Gopher. Andrew adds a working defer statement to the compiler, but concludes it probably shouldn't exist.

Andrew Healey

You Chose Go to Avoid Complexity. So Just Extend Postgres — TimescaleDB adds analytics to the Postgres you run. One system, no pipeline, no drift. Get $1000 credit to start.

Tiger Data (creators of TimescaleDB) sponsor

📄 Looking at the Memory Map of a Go 1.27 Program on Linux – Go 1.25+ names its memory mappings, making /proc/<pid>/maps readable. Chris Siebenmann

🛠 Code & Tools

Wails v3 Beta: A New Foundation for Go Desktop Apps — The Go desktop framework's long-awaited rewrite lands in beta with explicit app and window APIs, first-class multi-window support, Go services with TypeScript bindings generated via static analysis, and experimental iOS and Android support. Note that migrating from v2 will require real work.

Lea Anthony

Wireblast: A 100Gbps Packet Generator in Go — A Go app that uses AF_XDP to hit 14.88 million packets per second on 10G (and 138 Mpps on 100G) with no DPDK or hugepages needed. Where iperf3 tops out, this is just getting started! GitHub repo.

Andree Toonk

🤖 Fantasy 0.40 – Charm's library for building multi-provider, multi-model AI agents with a single API.
📡 GopherTrunk 0.9 – Pure-Go digital-trunking radio scanner engine for RTL-SDR.
GoProxy 1.9 – Create customized HTTP/HTTPS proxy servers with Go.
slacrawl 0.8 – Mirrors Slack workspace data into local SQLite.
pdfcpu 0.14 – Go PDF processing and manipulation library.
Delve 1.27.1 – The popular Go debugger.

🎉 There's a party goin' on right here…

JetBrains is holding an online release party for Go 1.27 on August 25.

Ainsley Clark and Jesús Espino (who created the Go 1.27 tour at the top of this issue) are hosting, and some of the team behind the Go 1.27 release will be taking part! Robert Griesemer, Alan Donovan, Marc Dougherty, Cameron Balahan, and Joe Tsai will be sharing some background about the release and answering viewers' questions live.

I take it this means Go 1.27 will definitely be out by the 25th then… 😅